] 82 Proceedings of the Royal Society of Victoria. 



The sandstone capping the hill covers the whole of the area 

 between the two streams, excepting in one or two places where 

 an outlier of newer volcanic rock overlies it, or where minor 

 valleys have cut through it. It gradually passes down into 

 limestone which is in places largely composed of polyzoa and 

 echini spines. The base of the limestone rests on the surface of 

 the ba.salt, which, though approximately level when taken as a 

 whole, is carved into steep and irregular depressions. The lower 

 part of the limestone is fall of well rounded basalt fragments, 

 from mere pebbles up to blocks of great size. Close to the 

 junction, and extending up from it for a variable distance in the 

 different sections, the limestone is altered to a hard pink crystal- 

 line rock, which is described by Professor Sir F. McCoy as in 

 some places " closely resembling lithographic stone."* 



This lock is full of fossils, but foi' the most part they exist as 

 casts only. They consist of trochiform shells, haliotis, cerithium, 

 and such forms as to-day live on the rocky, bouldery parts of our 

 coasts. That the Maude fossils are littoral forms has Ijeen 

 pointed out by Sir Fredk. McCoy, t The talus blocks of this 

 hard limestone are thickly strewn over the slopes below the out- 

 crop, and dozens of specimens, picked up at random and broken 

 with the hammer, displayed, in nearly every instance, rounded 

 fragments of basalt embedded in the mass. In no single section 

 did we find any evidence of the intercalation of a thin sheet oi 

 basalt. We inspected every outcrop M-e could find, and they 

 were many, and followed the valley some distance south of the 

 boundary of the quarter-sheet into unmapped country, but could 

 find no sign of the basalt which is represented on the map as 

 overlying the limestone, and as being in its turn overlain by 

 other " miocene'"' (eocene) beds. The numerous small (]uarries foj' 

 limestone showed over and over again, rounded pebbles and 

 blocks of basalt scattered through the rock. As we go up from 

 the basalt we find the limestone becoming less and less altered, 

 till it assumes the character of the ordinary polyzoal rock, that 

 is a rock of which the well-known Waurn Ponds building-stone 

 may be taken as the lithological type. In this comparatively 

 unaltered rock basalt fragments occur, but are not as numerous 



» rrod. Pul. Vic, Dec. III., p. 21. f Id. \\ 2 J. 



